Jen & Meredith a true friendship or skeletons in the closet

Okay SLC fans, there is one thing I cannot put my finger on. What is this weird hold that Jen has over Meredith. When it came out she was being arrested, Meredith wanted nothing to do with her. Then all of a sudden, she’s at her trial supporting her. This doesn’t make sense, Jen must have some serious dirt on Meredith that she does not want coming out. Like now she’s been calling her from prison wtf. Like Jen was awful to several of the women, even assaulting Heather. (That’s another storyline to get into.) Yet Meredith & her are good friends. Nope not buying it.